Light bar



FIG. 1 is a perspective view of a light bar;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a top view thereof.

The broken lines show portions of the light bar that form no part of the claimed design. Further, no lines, shading or other effects are meant to be indicative of any specified colors. 

CLAIM We claim the ornamental design for a light bar, as shown and described. 